The arguments given for the BEZIER program are two lists:
one of x-coordinates and one for y-coordinates.
The program switches to Parametric mode.

In order to accomplish this, I store lists to equation
variables, convert them to strings, and build a string to be converted to the
equation.

The commands Equ>String and String>Equ are found in
the catalog ([2nd] [ 0 ]).
The DelVar command can handle one variable at a time. Temporary variables (XT5, YT5, XT6, YT6,
Str7, Str8, Str9, Str0) are deleted at the end of the program to save space.